good news from nasa yesterday, they announced plans to explore deep space and eventually get humans to mars are on track and on budget. >> good. >> the space agency announcing the 384 foot rocket that they are building to carry humans beyond the moon starting in 221 is coming along nicely. they are on schedule, on budget for an unmanned test flight in 2017. boeing is the primary contractor, and they say they are about five months ahead of schedule. >> good. well, we will get newt gingrich home from london and suit him up. >> brian as national security reporter for the boston globe, let's talk first about this investigation up in boston. is it -- people are unpatient -- impatient, rather, as a people. should we be surprised that 48 hours after the bombing, we still have no idea who did it? >> i don't think we should be surprised. i mean these things take time. obviously, the authorities are piecing together what they can, as many clues as you mentioned earlier, going through video footage, you know, eyewitness reports trying to recreate these two explosive devices and no one has taken respon